On this day: February 15

2013: A meteor explodes over Chelyabinsk Oblast in Russia's Ural Mountains region, injuring 1,500 people as a shock wave blows out windows and rocks buildings. Measuring between 17 and 20 meters in size, it is the largest known natural object to have entered Earth's atmosphere since a small asteroid or comet destroyed a wide, remote, forested area of Siberia in 1908. The Chelyabinsk meteor is also the only meteor confirmed to have resulted in a large number of injuries.